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吸附相反应过程中,吸附层是反应的场所,吸附质在吸附层和本体溶液中的分配对吸附层中的反应和粒子的形成、生长过程有重大影响.通过定义相间分配比的概念,研究了不同吸附质种类、不同温度和水量条件下吸附质相间分配比的变化规律.采用XRD和TEM等手段考察了不同条件下制备所得样品的粒子大小、形貌等,并与相间分配比的变化趋势相比较,得到了相间分配比对粒径的调控规律.研究发现不同吸附质在相间分配比上存在的差异导致了晶粒粒径的变化,Cu(OAc)2的相间分配比大于NaOH的相间分配比,因此以Cu(OAc)2为吸附质制备得到的CuO粒子较小.同时在常温(0～40℃)和低水量条件下时,相间分配比的变化也是导致粒径变化的主要因素,温度升高和水量增加均导致相间分配比变大进而导致粒径变小.
In the process of adsorption phase reaction, the adsorbed layer is the reaction site, and the distribution of adsorbate in the adsorbed layer and the bulk solution has a significant effect on the reaction in the adsorbed layer and the formation and growth of particles. By defining the concept of interphase partition ratio, The change law of partition ratio of adsorbate and mass phases under different adsorbate species and different temperature and water conditions was investigated by means of XRD and TEM.The particle size and morphology of the sample prepared under different conditions were investigated and compared with the change of phase partition ratio The results showed that the difference of phase distribution ratio between different adsorbates resulted in the change of grain size, and the distribution ratio of Cu (OAc) 2 was greater than that of NaOH Therefore, CuO particles prepared by using Cu (OAc) 2 as adsorbate have smaller phase-to-phase distribution ratio, and the change of interphase partition ratio is also the main reason for the change of particle size at room temperature (0-40 ℃) Factors, elevated temperature and increased water lead to larger interphase partition ratios that lead to smaller particle sizes.